The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/dev/buslogic/bt.c

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    1 /*-
    2  * Generic driver for the BusLogic MultiMaster SCSI host adapters
    3  * Product specific probe and attach routines can be found in:
    4  * sys/dev/buslogic/bt_isa.c    BT-54X, BT-445 cards
    5  * sys/dev/buslogic/bt_mca.c    BT-64X, SDC3211B, SDC3211F
    6  * sys/dev/buslogic/bt_pci.c    BT-946, BT-948, BT-956, BT-958 cards
    7  *
    8  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
    9  *
   10  * Copyright (c) 1998, 1999 Justin T. Gibbs.
   11  * All rights reserved.
   12  *
   13  * Redistribution and use in source and binary forms, with or without
   14  * modification, are permitted provided that the following conditions
   15  * are met:
   16  * 1. Redistributions of source code must retain the above copyright
   17  *    notice, this list of conditions, and the following disclaimer,
   18  *    without modification, immediately at the beginning of the file.
   19  * 2. The name of the author may not be used to endorse or promote products
   20  *    derived from this software without specific prior written permission.
   21  *
   22  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   25  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
   26  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   32  * SUCH DAMAGE.
   33  */
   34 
   35 #include <sys/cdefs.h>
   36 __FBSDID("$FreeBSD: releng/12.0/sys/dev/buslogic/bt.c 328523 2018-01-29 00:14:46Z imp $");
   37 
   38  /*
   39   * Special thanks to Leonard N. Zubkoff for writing such a complete and
   40   * well documented Mylex/BusLogic MultiMaster driver for Linux.  Support
   41   * in this driver for the wide range of MultiMaster controllers and
   42   * firmware revisions, with their otherwise undocumented quirks, would not
   43   * have been possible without his efforts.
   44   */
   45 
   46 #include <sys/param.h>
   47 #include <sys/conf.h>
   48 #include <sys/systm.h> 
   49 #include <sys/malloc.h>
   50 #include <sys/kernel.h>
   51 #include <sys/lock.h>
   52 #include <sys/module.h>
   53 #include <sys/mutex.h>
   54 #include <sys/sysctl.h>
   55 #include <sys/bus.h>
   56  
   57 #include <machine/bus.h>
   58 #include <sys/rman.h>
   59 
   60 #include <cam/cam.h>
   61 #include <cam/cam_ccb.h>
   62 #include <cam/cam_sim.h>
   63 #include <cam/cam_xpt_sim.h>
   64 #include <cam/cam_debug.h>
   65 
   66 #include <cam/scsi/scsi_message.h>
   67 
   68 #include <vm/vm.h>
   69 #include <vm/pmap.h>
   70  
   71 #include <dev/buslogic/btreg.h>
   72 
   73 /* MailBox Management functions */
   74 static __inline void    btnextinbox(struct bt_softc *bt);
   75 static __inline void    btnextoutbox(struct bt_softc *bt);
   76 
   77 static __inline void
   78 btnextinbox(struct bt_softc *bt)
   79 {
   80         if (bt->cur_inbox == bt->last_inbox)
   81                 bt->cur_inbox = bt->in_boxes;
   82         else
   83                 bt->cur_inbox++;
   84 }
   85 
   86 static __inline void
   87 btnextoutbox(struct bt_softc *bt)
   88 {
   89         if (bt->cur_outbox == bt->last_outbox)
   90                 bt->cur_outbox = bt->out_boxes;
   91         else
   92                 bt->cur_outbox++;
   93 }
   94 
   95 /* CCB Mangement functions */
   96 static __inline u_int32_t               btccbvtop(struct bt_softc *bt,
   97                                                   struct bt_ccb *bccb);
   98 static __inline struct bt_ccb*          btccbptov(struct bt_softc *bt,
   99                                                   u_int32_t ccb_addr);
  100 static __inline u_int32_t               btsensepaddr(struct bt_softc *bt,
  101                                                      struct bt_ccb *bccb);
  102 static __inline struct scsi_sense_data* btsensevaddr(struct bt_softc *bt,
  103                                                      struct bt_ccb *bccb);
  104 
  105 static __inline u_int32_t
  106 btccbvtop(struct bt_softc *bt, struct bt_ccb *bccb)
  107 {
  108         return (bt->bt_ccb_physbase
  109               + (u_int32_t)((caddr_t)bccb - (caddr_t)bt->bt_ccb_array));
  110 }
  111 
  112 static __inline struct bt_ccb *
  113 btccbptov(struct bt_softc *bt, u_int32_t ccb_addr)
  114 {
  115         return (bt->bt_ccb_array +
  116                 ((struct bt_ccb*)(uintptr_t)ccb_addr - (struct bt_ccb*)(uintptr_t)bt->bt_ccb_physbase));
  117 }
  118 
  119 static __inline u_int32_t
  120 btsensepaddr(struct bt_softc *bt, struct bt_ccb *bccb)
  121 {
  122         u_int index;
  123 
  124         index = (u_int)(bccb - bt->bt_ccb_array);
  125         return (bt->sense_buffers_physbase
  126                 + (index * sizeof(struct scsi_sense_data)));
  127 }
  128 
  129 static __inline struct scsi_sense_data *
  130 btsensevaddr(struct bt_softc *bt, struct bt_ccb *bccb)
  131 {
  132         u_int index;
  133 
  134         index = (u_int)(bccb - bt->bt_ccb_array);
  135         return (bt->sense_buffers + index);
  136 }
  137 
  138 static __inline struct bt_ccb*  btgetccb(struct bt_softc *bt);
  139 static __inline void            btfreeccb(struct bt_softc *bt,
  140                                           struct bt_ccb *bccb);
  141 static void             btallocccbs(struct bt_softc *bt);
  142 static bus_dmamap_callback_t btexecuteccb;
  143 static void             btdone(struct bt_softc *bt, struct bt_ccb *bccb,
  144                                bt_mbi_comp_code_t comp_code);
  145 static void             bt_intr_locked(struct bt_softc *bt);
  146 
  147 /* Host adapter command functions */
  148 static int      btreset(struct bt_softc* bt, int hard_reset);
  149 
  150 /* Initialization functions */
  151 static int                      btinitmboxes(struct bt_softc *bt);
  152 static bus_dmamap_callback_t    btmapmboxes;
  153 static bus_dmamap_callback_t    btmapccbs;
  154 static bus_dmamap_callback_t    btmapsgs;
  155 
  156 /* Transfer Negotiation Functions */
  157 static void btfetchtransinfo(struct bt_softc *bt,
  158                              struct ccb_trans_settings *cts);
  159 
  160 /* CAM SIM entry points */
  161 #define ccb_bccb_ptr spriv_ptr0
  162 #define ccb_bt_ptr spriv_ptr1
  163 static void     btaction(struct cam_sim *sim, union ccb *ccb);
  164 static void     btpoll(struct cam_sim *sim);
  165 
  166 /* Our timeout handler */
  167 static void     bttimeout(void *arg);
  168 
  169 /*
  170  * XXX
  171  * Do our own re-probe protection until a configuration
  172  * manager can do it for us.  This ensures that we don't
  173  * reprobe a card already found by the PCI probes.
  174  */
  175 struct bt_isa_port bt_isa_ports[] =
  176 {
  177         { 0x130, 0, 4 },
  178         { 0x134, 0, 5 },
  179         { 0x230, 0, 2 },
  180         { 0x234, 0, 3 },
  181         { 0x330, 0, 0 },
  182         { 0x334, 0, 1 }
  183 };
  184 
  185 /*
  186  * I/O ports listed in the order enumerated by the
  187  * card for certain op codes.
  188  */
  189 u_int16_t bt_board_ports[] =
  190 {
  191         0x330,
  192         0x334,
  193         0x230,
  194         0x234,
  195         0x130,
  196         0x134
  197 };
  198 
  199 /* Exported functions */
  200 void
  201 bt_init_softc(device_t dev, struct resource *port,
  202               struct resource *irq, struct resource *drq)
  203 {
  204         struct bt_softc *bt = device_get_softc(dev);
  205 
  206         SLIST_INIT(&bt->free_bt_ccbs);
  207         LIST_INIT(&bt->pending_ccbs);
  208         SLIST_INIT(&bt->sg_maps);
  209         bt->dev = dev;
  210         bt->port = port;
  211         bt->irq = irq;
  212         bt->drq = drq;
  213         mtx_init(&bt->lock, "bt", NULL, MTX_DEF);
  214 }
  215 
  216 void
  217 bt_free_softc(device_t dev)
  218 {
  219         struct bt_softc *bt = device_get_softc(dev);
  220 
  221         switch (bt->init_level) {
  222         default:
  223         case 11:
  224                 bus_dmamap_unload(bt->sense_dmat, bt->sense_dmamap);
  225         case 10:
  226                 bus_dmamem_free(bt->sense_dmat, bt->sense_buffers,
  227                                 bt->sense_dmamap);
  228         case 9:
  229                 bus_dma_tag_destroy(bt->sense_dmat);
  230         case 8:
  231         {
  232                 struct sg_map_node *sg_map;
  233 
  234                 while ((sg_map = SLIST_FIRST(&bt->sg_maps))!= NULL) {
  235                         SLIST_REMOVE_HEAD(&bt->sg_maps, links);
  236                         bus_dmamap_unload(bt->sg_dmat,
  237                                           sg_map->sg_dmamap);
  238                         bus_dmamem_free(bt->sg_dmat, sg_map->sg_vaddr,
  239                                         sg_map->sg_dmamap);
  240                         free(sg_map, M_DEVBUF);
  241                 }
  242                 bus_dma_tag_destroy(bt->sg_dmat);
  243         }
  244         case 7:
  245                 bus_dmamap_unload(bt->ccb_dmat, bt->ccb_dmamap);
  246                 /* FALLTHROUGH */
  247         case 6:
  248                 bus_dmamem_free(bt->ccb_dmat, bt->bt_ccb_array,
  249                                 bt->ccb_dmamap);
  250                 /* FALLTHROUGH */
  251         case 5:
  252                 bus_dma_tag_destroy(bt->ccb_dmat);
  253                 /* FALLTHROUGH */
  254         case 4:
  255                 bus_dmamap_unload(bt->mailbox_dmat, bt->mailbox_dmamap);
  256                 /* FALLTHROUGH */
  257         case 3:
  258                 bus_dmamem_free(bt->mailbox_dmat, bt->in_boxes,
  259                                 bt->mailbox_dmamap);
  260                 /* FALLTHROUGH */
  261         case 2:
  262                 bus_dma_tag_destroy(bt->buffer_dmat);
  263                 /* FALLTHROUGH */
  264         case 1:
  265                 bus_dma_tag_destroy(bt->mailbox_dmat);
  266                 /* FALLTHROUGH */
  267         case 0:
  268                 break;
  269         }
  270         mtx_destroy(&bt->lock);
  271 }
  272 
  273 int
  274 bt_port_probe(device_t dev, struct bt_probe_info *info)
  275 {
  276         struct bt_softc *bt = device_get_softc(dev);
  277         config_data_t config_data;
  278         int error;
  279 
  280         /* See if there is really a card present */
  281         if (bt_probe(dev) || bt_fetch_adapter_info(dev))
  282                 return(1);
  283 
  284         /*
  285          * Determine our IRQ, and DMA settings and
  286          * export them to the configuration system.
  287          */
  288         mtx_lock(&bt->lock);
  289         error = bt_cmd(bt, BOP_INQUIRE_CONFIG, NULL, /*parmlen*/0,
  290                        (u_int8_t*)&config_data, sizeof(config_data),
  291                        DEFAULT_CMD_TIMEOUT);
  292         mtx_unlock(&bt->lock);
  293         if (error != 0) {
  294                 printf("bt_port_probe: Could not determine IRQ or DMA "
  295                        "settings for adapter.\n");
  296                 return (1);
  297         }
  298 
  299         if (bt->model[0] == '5') {
  300                 /* DMA settings only make sense for ISA cards */
  301                 switch (config_data.dma_chan) {
  302                 case DMA_CHAN_5:
  303                         info->drq = 5;
  304                         break;
  305                 case DMA_CHAN_6:
  306                         info->drq = 6;
  307                         break;
  308                 case DMA_CHAN_7:
  309                         info->drq = 7;
  310                         break;
  311                 default:
  312                         printf("bt_port_probe: Invalid DMA setting "
  313                                "detected for adapter.\n");
  314                         return (1);
  315                 }
  316         } else {
  317                 info->drq = -1;
  318         }
  319         switch (config_data.irq) {
  320         case IRQ_9:
  321         case IRQ_10:
  322         case IRQ_11:
  323         case IRQ_12:
  324         case IRQ_14:
  325         case IRQ_15:
  326                 info->irq = ffs(config_data.irq) + 8;
  327                 break;
  328         default:
  329                 printf("bt_port_probe: Invalid IRQ setting %x"
  330                        "detected for adapter.\n", config_data.irq);
  331                 return (1);
  332         }
  333         return (0);
  334 }
  335 
  336 /*
  337  * Probe the adapter and verify that the card is a BusLogic.
  338  */
  339 int
  340 bt_probe(device_t dev)
  341 {
  342         struct bt_softc *bt = device_get_softc(dev);
  343         esetup_info_data_t esetup_info;
  344         u_int    status;
  345         u_int    intstat;
  346         u_int    geometry;
  347         int      error;
  348         u_int8_t param;
  349 
  350         /*
  351          * See if the three I/O ports look reasonable.
  352          * Touch the minimal number of registers in the
  353          * failure case.
  354          */
  355         status = bt_inb(bt, STATUS_REG);
  356         if ((status == 0)
  357          || (status & (DIAG_ACTIVE|CMD_REG_BUSY|
  358                        STATUS_REG_RSVD|CMD_INVALID)) != 0) {
  359                 if (bootverbose)
  360                         device_printf(dev, "Failed Status Reg Test - %x\n",
  361                                status);
  362                 return (ENXIO);
  363         }
  364 
  365         intstat = bt_inb(bt, INTSTAT_REG);
  366         if ((intstat & INTSTAT_REG_RSVD) != 0) {
  367                 device_printf(dev, "Failed Intstat Reg Test\n");
  368                 return (ENXIO);
  369         }
  370 
  371         geometry = bt_inb(bt, GEOMETRY_REG);
  372         if (geometry == 0xFF) {
  373                 if (bootverbose)
  374                         device_printf(dev, "Failed Geometry Reg Test\n");
  375                 return (ENXIO);
  376         }
  377 
  378         /*
  379          * Looking good so far.  Final test is to reset the
  380          * adapter and attempt to fetch the extended setup
  381          * information.  This should filter out all 1542 cards.
  382          */
  383         mtx_lock(&bt->lock);
  384         if ((error = btreset(bt, /*hard_reset*/TRUE)) != 0) {
  385                 mtx_unlock(&bt->lock);
  386                 if (bootverbose)
  387                         device_printf(dev, "Failed Reset\n");
  388                 return (ENXIO);
  389         }
  390         
  391         param = sizeof(esetup_info);
  392         error = bt_cmd(bt, BOP_INQUIRE_ESETUP_INFO, &param, /*parmlen*/1,
  393                        (u_int8_t*)&esetup_info, sizeof(esetup_info),
  394                        DEFAULT_CMD_TIMEOUT);
  395         mtx_unlock(&bt->lock);
  396         if (error != 0) {
  397                 return (ENXIO);
  398         }
  399 
  400         return (0);
  401 }
  402 
  403 /*
  404  * Pull the boards setup information and record it in our softc.
  405  */
  406 int
  407 bt_fetch_adapter_info(device_t dev)
  408 {
  409         struct bt_softc *bt = device_get_softc(dev);
  410         board_id_data_t board_id;
  411         esetup_info_data_t esetup_info;
  412         config_data_t config_data;
  413         int      error;
  414         u_int8_t length_param;
  415 
  416         /* First record the firmware version */
  417         mtx_lock(&bt->lock);
  418         error = bt_cmd(bt, BOP_INQUIRE_BOARD_ID, NULL, /*parmlen*/0,
  419                        (u_int8_t*)&board_id, sizeof(board_id),
  420                        DEFAULT_CMD_TIMEOUT);
  421         if (error != 0) {
  422                 mtx_unlock(&bt->lock);
  423                 device_printf(dev, "bt_fetch_adapter_info - Failed Get Board Info\n");
  424                 return (error);
  425         }
  426         bt->firmware_ver[0] = board_id.firmware_rev_major;
  427         bt->firmware_ver[1] = '.';
  428         bt->firmware_ver[2] = board_id.firmware_rev_minor;
  429         bt->firmware_ver[3] = '\0';
  430                 
  431         /*
  432          * Depending on the firmware major and minor version,
  433          * we may be able to fetch additional minor version info.
  434          */
  435         if (bt->firmware_ver[0] > '') {
  436                 
  437                 error = bt_cmd(bt, BOP_INQUIRE_FW_VER_3DIG, NULL, /*parmlen*/0,
  438                                (u_int8_t*)&bt->firmware_ver[3], 1,
  439                                DEFAULT_CMD_TIMEOUT);
  440                 if (error != 0) {
  441                         mtx_unlock(&bt->lock);
  442                         device_printf(dev,
  443                                       "bt_fetch_adapter_info - Failed Get "
  444                                       "Firmware 3rd Digit\n");
  445                         return (error);
  446                 }
  447                 if (bt->firmware_ver[3] == ' ')
  448                         bt->firmware_ver[3] = '\0';
  449                 bt->firmware_ver[4] = '\0';
  450         }
  451 
  452         if (strcmp(bt->firmware_ver, "3.3") >= 0) {
  453 
  454                 error = bt_cmd(bt, BOP_INQUIRE_FW_VER_4DIG, NULL, /*parmlen*/0,
  455                                (u_int8_t*)&bt->firmware_ver[4], 1,
  456                                DEFAULT_CMD_TIMEOUT);
  457                 if (error != 0) {
  458                         mtx_unlock(&bt->lock);
  459                         device_printf(dev,
  460                                       "bt_fetch_adapter_info - Failed Get "
  461                                       "Firmware 4th Digit\n");
  462                         return (error);
  463                 }
  464                 if (bt->firmware_ver[4] == ' ')
  465                         bt->firmware_ver[4] = '\0';
  466                 bt->firmware_ver[5] = '\0';
  467         }
  468 
  469         /*
  470          * Some boards do not handle the "recently documented"
  471          * Inquire Board Model Number command correctly or do not give
  472          * exact information.  Use the Firmware and Extended Setup
  473          * information in these cases to come up with the right answer.
  474          * The major firmware revision number indicates:
  475          *
  476          *      5.xx    BusLogic "W" Series Host Adapters:
  477          *              BT-948/958/958D
  478          *      4.xx    BusLogic "C" Series Host Adapters:
  479          *              BT-946C/956C/956CD/747C/757C/757CD/445C/545C/540CF
  480          *      3.xx    BusLogic "S" Series Host Adapters:
  481          *              BT-747S/747D/757S/757D/445S/545S/542D
  482          *              BT-542B/742A (revision H)
  483          *      2.xx    BusLogic "A" Series Host Adapters:
  484          *              BT-542B/742A (revision G and below)
  485          */
  486         length_param = sizeof(esetup_info);
  487         error = bt_cmd(bt, BOP_INQUIRE_ESETUP_INFO, &length_param, /*parmlen*/1,
  488                        (u_int8_t*)&esetup_info, sizeof(esetup_info),
  489                        DEFAULT_CMD_TIMEOUT);
  490         if (error != 0) {
  491                 mtx_unlock(&bt->lock);
  492                 return (error);
  493         }
  494         
  495         bt->bios_addr = esetup_info.bios_addr << 12;
  496 
  497         bt->mailbox_addrlimit = BUS_SPACE_MAXADDR;
  498         if (esetup_info.bus_type == 'A'
  499          && bt->firmware_ver[0] == '2') {
  500                 snprintf(bt->model, sizeof(bt->model), "542B");
  501         } else {
  502                 ha_model_data_t model_data;
  503                 int i;
  504 
  505                 length_param = sizeof(model_data);
  506                 error = bt_cmd(bt, BOP_INQUIRE_MODEL, &length_param, 1,
  507                                (u_int8_t*)&model_data, sizeof(model_data),
  508                                DEFAULT_CMD_TIMEOUT);
  509                 if (error != 0) {
  510                         mtx_unlock(&bt->lock);
  511                         device_printf(dev,
  512                                       "bt_fetch_adapter_info - Failed Inquire "
  513                                       "Model Number\n");
  514                         return (error);
  515                 }
  516                 for (i = 0; i < sizeof(model_data.ascii_model); i++) {
  517                         bt->model[i] = model_data.ascii_model[i];
  518                         if (bt->model[i] == ' ')
  519                                 break;
  520                 }
  521                 bt->model[i] = '\0';
  522         }
  523 
  524         bt->level_trigger_ints = esetup_info.level_trigger_ints ? 1 : 0;
  525 
  526         /* SG element limits */
  527         bt->max_sg = esetup_info.max_sg;
  528 
  529         /* Set feature flags */
  530         bt->wide_bus = esetup_info.wide_bus;
  531         bt->diff_bus = esetup_info.diff_bus;
  532         bt->ultra_scsi = esetup_info.ultra_scsi;
  533 
  534         if ((bt->firmware_ver[0] == '5')
  535          || (bt->firmware_ver[0] == '4' && bt->wide_bus))
  536                 bt->extended_lun = TRUE;
  537 
  538         bt->strict_rr = (strcmp(bt->firmware_ver, "3.31") >= 0);
  539 
  540         bt->extended_trans =
  541             ((bt_inb(bt, GEOMETRY_REG) & EXTENDED_TRANSLATION) != 0);
  542 
  543         /*
  544          * Determine max CCB count and whether tagged queuing is
  545          * available based on controller type. Tagged queuing
  546          * only works on 'W' series adapters, 'C' series adapters
  547          * with firmware of rev 4.42 and higher, and 'S' series
  548          * adapters with firmware of rev 3.35 and higher.  The
  549          * maximum CCB counts are as follows:
  550          *
  551          *      192     BT-948/958/958D
  552          *      100     BT-946C/956C/956CD/747C/757C/757CD/445C
  553          *      50      BT-545C/540CF
  554          *      30      BT-747S/747D/757S/757D/445S/545S/542D/542B/742A
  555          */
  556         if (bt->firmware_ver[0] == '5') {
  557                 bt->max_ccbs = 192;
  558                 bt->tag_capable = TRUE;
  559         } else if (bt->firmware_ver[0] == '4') {
  560                 if (bt->model[0] == '5')
  561                         bt->max_ccbs = 50;
  562                 else
  563                         bt->max_ccbs = 100;
  564                 bt->tag_capable = (strcmp(bt->firmware_ver, "4.22") >= 0);
  565         } else {
  566                 bt->max_ccbs = 30;
  567                 if (bt->firmware_ver[0] == '3'
  568                  && (strcmp(bt->firmware_ver, "3.35") >= 0))
  569                         bt->tag_capable = TRUE;
  570                 else
  571                         bt->tag_capable = FALSE;
  572         }
  573 
  574         if (bt->tag_capable != FALSE)
  575                 bt->tags_permitted = ALL_TARGETS;
  576 
  577         /* Determine Sync/Wide/Disc settings */
  578         if (bt->firmware_ver[0] >= '4') {
  579                 auto_scsi_data_t auto_scsi_data;
  580                 fetch_lram_params_t fetch_lram_params;
  581                 int error;
  582                 
  583                 /*
  584                  * These settings are stored in the
  585                  * AutoSCSI data in LRAM of 'W' and 'C'
  586                  * adapters.
  587                  */
  588                 fetch_lram_params.offset = AUTO_SCSI_BYTE_OFFSET;
  589                 fetch_lram_params.response_len = sizeof(auto_scsi_data);
  590                 error = bt_cmd(bt, BOP_FETCH_LRAM,
  591                                (u_int8_t*)&fetch_lram_params,
  592                                sizeof(fetch_lram_params),
  593                                (u_int8_t*)&auto_scsi_data,
  594                                sizeof(auto_scsi_data), DEFAULT_CMD_TIMEOUT);
  595 
  596                 if (error != 0) {
  597                         mtx_unlock(&bt->lock);
  598                         device_printf(dev,
  599                                       "bt_fetch_adapter_info - Failed "
  600                                       "Get Auto SCSI Info\n");
  601                         return (error);
  602                 }
  603 
  604                 bt->disc_permitted = auto_scsi_data.low_disc_permitted
  605                                    | (auto_scsi_data.high_disc_permitted << 8);
  606                 bt->sync_permitted = auto_scsi_data.low_sync_permitted
  607                                    | (auto_scsi_data.high_sync_permitted << 8);
  608                 bt->fast_permitted = auto_scsi_data.low_fast_permitted
  609                                    | (auto_scsi_data.high_fast_permitted << 8);
  610                 bt->ultra_permitted = auto_scsi_data.low_ultra_permitted
  611                                    | (auto_scsi_data.high_ultra_permitted << 8);
  612                 bt->wide_permitted = auto_scsi_data.low_wide_permitted
  613                                    | (auto_scsi_data.high_wide_permitted << 8);
  614 
  615                 if (bt->ultra_scsi == FALSE)
  616                         bt->ultra_permitted = 0;
  617 
  618                 if (bt->wide_bus == FALSE)
  619                         bt->wide_permitted = 0;
  620         } else {
  621                 /*
  622                  * 'S' and 'A' series have this information in the setup
  623                  * information structure.
  624                  */
  625                 setup_data_t    setup_info;
  626 
  627                 length_param = sizeof(setup_info);
  628                 error = bt_cmd(bt, BOP_INQUIRE_SETUP_INFO, &length_param,
  629                                /*paramlen*/1, (u_int8_t*)&setup_info,
  630                                sizeof(setup_info), DEFAULT_CMD_TIMEOUT);
  631 
  632                 if (error != 0) {
  633                         mtx_unlock(&bt->lock);
  634                         device_printf(dev,
  635                                       "bt_fetch_adapter_info - Failed "
  636                                       "Get Setup Info\n");
  637                         return (error);
  638                 }
  639 
  640                 if (setup_info.initiate_sync != 0) {
  641                         bt->sync_permitted = ALL_TARGETS;
  642 
  643                         if (bt->model[0] == '7') {
  644                                 if (esetup_info.sync_neg10MB != 0)
  645                                         bt->fast_permitted = ALL_TARGETS;
  646                                 if (strcmp(bt->model, "757") == 0)
  647                                         bt->wide_permitted = ALL_TARGETS;
  648                         }
  649                 }
  650                 bt->disc_permitted = ALL_TARGETS;
  651         }
  652 
  653         /* We need as many mailboxes as we can have ccbs */
  654         bt->num_boxes = bt->max_ccbs;
  655 
  656         /* Determine our SCSI ID */
  657         
  658         error = bt_cmd(bt, BOP_INQUIRE_CONFIG, NULL, /*parmlen*/0,
  659                        (u_int8_t*)&config_data, sizeof(config_data),
  660                        DEFAULT_CMD_TIMEOUT);
  661         mtx_unlock(&bt->lock);
  662         if (error != 0) {
  663                 device_printf(dev,
  664                               "bt_fetch_adapter_info - Failed Get Config\n");
  665                 return (error);
  666         }
  667         bt->scsi_id = config_data.scsi_id;
  668 
  669         return (0);
  670 }
  671 
  672 /*
  673  * Start the board, ready for normal operation
  674  */
  675 int
  676 bt_init(device_t dev)
  677 {
  678         struct bt_softc *bt = device_get_softc(dev);
  679 
  680         /* Announce the Adapter */
  681         device_printf(dev, "BT-%s FW Rev. %s ", bt->model, bt->firmware_ver);
  682 
  683         if (bt->ultra_scsi != 0)
  684                 printf("Ultra ");
  685 
  686         if (bt->wide_bus != 0)
  687                 printf("Wide ");
  688         else
  689                 printf("Narrow ");
  690 
  691         if (bt->diff_bus != 0)
  692                 printf("Diff ");
  693 
  694         printf("SCSI Host Adapter, SCSI ID %d, %d CCBs\n", bt->scsi_id,
  695                bt->max_ccbs);
  696 
  697         /*
  698          * Create our DMA tags.  These tags define the kinds of device
  699          * accessible memory allocations and memory mappings we will 
  700          * need to perform during normal operation.
  701          *
  702          * Unless we need to further restrict the allocation, we rely
  703          * on the restrictions of the parent dmat, hence the common
  704          * use of MAXADDR and MAXSIZE.
  705          */
  706 
  707         /* DMA tag for mapping buffers into device visible space. */
  708         if (bus_dma_tag_create( /* parent       */ bt->parent_dmat,
  709                                 /* alignment    */ 1,
  710                                 /* boundary     */ 0,
  711                                 /* lowaddr      */ BUS_SPACE_MAXADDR,
  712                                 /* highaddr     */ BUS_SPACE_MAXADDR,
  713                                 /* filter       */ NULL,
  714                                 /* filterarg    */ NULL,
  715                                 /* maxsize      */ DFLTPHYS,
  716                                 /* nsegments    */ BT_NSEG,
  717                                 /* maxsegsz     */ BUS_SPACE_MAXSIZE_32BIT,
  718                                 /* flags        */ BUS_DMA_ALLOCNOW,
  719                                 /* lockfunc     */ busdma_lock_mutex,
  720                                 /* lockarg      */ &bt->lock,
  721                                 &bt->buffer_dmat) != 0) {
  722                 goto error_exit;
  723         }
  724 
  725         bt->init_level++;
  726         /* DMA tag for our mailboxes */
  727         if (bus_dma_tag_create( /* parent       */ bt->parent_dmat,
  728                                 /* alignment    */ 1,
  729                                 /* boundary     */ 0,
  730                                 /* lowaddr      */ bt->mailbox_addrlimit,
  731                                 /* highaddr     */ BUS_SPACE_MAXADDR,
  732                                 /* filter       */ NULL,
  733                                 /* filterarg    */ NULL,
  734                                 /* maxsize      */ bt->num_boxes *
  735                                                    (sizeof(bt_mbox_in_t) +
  736                                                     sizeof(bt_mbox_out_t)),
  737                                 /* nsegments    */ 1,
  738                                 /* maxsegsz     */ BUS_SPACE_MAXSIZE_32BIT,
  739                                 /* flags        */ 0,
  740                                 /* lockfunc     */ NULL,
  741                                 /* lockarg      */ NULL,
  742                                 &bt->mailbox_dmat) != 0) {
  743                 goto error_exit;
  744         }
  745 
  746         bt->init_level++;
  747 
  748         /* Allocation for our mailboxes */
  749         if (bus_dmamem_alloc(bt->mailbox_dmat, (void **)&bt->out_boxes,
  750                              BUS_DMA_NOWAIT, &bt->mailbox_dmamap) != 0) {
  751                 goto error_exit;
  752         }
  753 
  754         bt->init_level++;
  755 
  756         /* And permanently map them */
  757         bus_dmamap_load(bt->mailbox_dmat, bt->mailbox_dmamap,
  758                         bt->out_boxes,
  759                         bt->num_boxes * (sizeof(bt_mbox_in_t)
  760                                        + sizeof(bt_mbox_out_t)),
  761                         btmapmboxes, bt, /*flags*/0);
  762 
  763         bt->init_level++;
  764 
  765         bt->in_boxes = (bt_mbox_in_t *)&bt->out_boxes[bt->num_boxes];
  766 
  767         mtx_lock(&bt->lock);
  768         btinitmboxes(bt);
  769         mtx_unlock(&bt->lock);
  770 
  771         /* DMA tag for our ccb structures */
  772         if (bus_dma_tag_create( /* parent       */ bt->parent_dmat,
  773                                 /* alignment    */ 1,
  774                                 /* boundary     */ 0,
  775                                 /* lowaddr      */ BUS_SPACE_MAXADDR,
  776                                 /* highaddr     */ BUS_SPACE_MAXADDR,
  777                                 /* filter       */ NULL,
  778                                 /* filterarg    */ NULL,
  779                                 /* maxsize      */ bt->max_ccbs *
  780                                                    sizeof(struct bt_ccb),
  781                                 /* nsegments    */ 1,
  782                                 /* maxsegsz     */ BUS_SPACE_MAXSIZE_32BIT,
  783                                 /* flags        */ 0,
  784                                 /* lockfunc     */ NULL,
  785                                 /* lockarg      */ NULL,
  786                                 &bt->ccb_dmat) != 0) {
  787                 goto error_exit;
  788         }
  789 
  790         bt->init_level++;
  791 
  792         /* Allocation for our ccbs */
  793         if (bus_dmamem_alloc(bt->ccb_dmat, (void **)&bt->bt_ccb_array,
  794                              BUS_DMA_NOWAIT, &bt->ccb_dmamap) != 0) {
  795                 goto error_exit;
  796         }
  797 
  798         bt->init_level++;
  799 
  800         /* And permanently map them */
  801         bus_dmamap_load(bt->ccb_dmat, bt->ccb_dmamap,
  802                         bt->bt_ccb_array,
  803                         bt->max_ccbs * sizeof(struct bt_ccb),
  804                         btmapccbs, bt, /*flags*/0);
  805 
  806         bt->init_level++;
  807 
  808         /* DMA tag for our S/G structures.  We allocate in page sized chunks */
  809         if (bus_dma_tag_create( /* parent       */ bt->parent_dmat,
  810                                 /* alignment    */ 1,
  811                                 /* boundary     */ 0,
  812                                 /* lowaddr      */ BUS_SPACE_MAXADDR,
  813                                 /* highaddr     */ BUS_SPACE_MAXADDR,
  814                                 /* filter       */ NULL,
  815                                 /* filterarg    */ NULL,
  816                                 /* maxsize      */ PAGE_SIZE,
  817                                 /* nsegments    */ 1,
  818                                 /* maxsegsz     */ BUS_SPACE_MAXSIZE_32BIT,
  819                                 /* flags        */ 0,
  820                                 /* lockfunc     */ NULL,
  821                                 /* lockarg      */ NULL,
  822                                 &bt->sg_dmat) != 0) {
  823                 goto error_exit;
  824         }
  825 
  826         bt->init_level++;
  827 
  828         /* Perform initial CCB allocation */
  829         bzero(bt->bt_ccb_array, bt->max_ccbs * sizeof(struct bt_ccb));
  830         btallocccbs(bt);
  831 
  832         if (bt->num_ccbs == 0) {
  833                 device_printf(dev,
  834                               "bt_init - Unable to allocate initial ccbs\n");
  835                 goto error_exit;
  836         }
  837 
  838         /*
  839          * Note that we are going and return (to attach)
  840          */
  841         return 0;
  842 
  843 error_exit:
  844 
  845         return (ENXIO);
  846 }
  847 
  848 int
  849 bt_attach(device_t dev)
  850 {
  851         struct bt_softc *bt = device_get_softc(dev);
  852         int tagged_dev_openings;
  853         struct cam_devq *devq;
  854         int error;
  855 
  856         /*
  857          * We reserve 1 ccb for error recovery, so don't
  858          * tell the XPT about it.
  859          */
  860         if (bt->tag_capable != 0)
  861                 tagged_dev_openings = bt->max_ccbs - 1;
  862         else
  863                 tagged_dev_openings = 0;
  864 
  865         /*
  866          * Create the device queue for our SIM.
  867          */
  868         devq = cam_simq_alloc(bt->max_ccbs - 1);
  869         if (devq == NULL)
  870                 return (ENOMEM);
  871 
  872         /*
  873          * Construct our SIM entry
  874          */
  875         bt->sim = cam_sim_alloc(btaction, btpoll, "bt", bt,
  876             device_get_unit(bt->dev), &bt->lock, 2, tagged_dev_openings, devq);
  877         if (bt->sim == NULL) {
  878                 cam_simq_free(devq);
  879                 return (ENOMEM);
  880         }
  881 
  882         mtx_lock(&bt->lock);
  883         if (xpt_bus_register(bt->sim, dev, 0) != CAM_SUCCESS) {
  884                 cam_sim_free(bt->sim, /*free_devq*/TRUE);
  885                 mtx_unlock(&bt->lock);
  886                 return (ENXIO);
  887         }
  888         
  889         if (xpt_create_path(&bt->path, /*periph*/NULL,
  890                             cam_sim_path(bt->sim), CAM_TARGET_WILDCARD,
  891                             CAM_LUN_WILDCARD) != CAM_REQ_CMP) {
  892                 xpt_bus_deregister(cam_sim_path(bt->sim));
  893                 cam_sim_free(bt->sim, /*free_devq*/TRUE);
  894                 mtx_unlock(&bt->lock);
  895                 return (ENXIO);
  896         }
  897         mtx_unlock(&bt->lock);
  898                 
  899         /*
  900          * Setup interrupt.
  901          */
  902         error = bus_setup_intr(dev, bt->irq, INTR_TYPE_CAM | INTR_ENTROPY |
  903             INTR_MPSAFE, NULL, bt_intr, bt, &bt->ih);
  904         if (error) {
  905                 device_printf(dev, "bus_setup_intr() failed: %d\n", error);
  906                 return (error);
  907         }
  908         gone_in_dev(dev, 12, "bt(4) driver");
  909 
  910         return (0);
  911 }
  912 
  913 int
  914 bt_check_probed_iop(u_int ioport)
  915 {
  916         u_int i;
  917 
  918         for (i = 0; i < BT_NUM_ISAPORTS; i++) {
  919                 if (bt_isa_ports[i].addr == ioport) {
  920                         if (bt_isa_ports[i].probed != 0)
  921                                 return (1);
  922                         else {
  923                                 return (0);
  924                         }
  925                 }
  926         }
  927         return (1);
  928 }
  929 
  930 void
  931 bt_mark_probed_bio(isa_compat_io_t port)
  932 {
  933         if (port < BIO_DISABLED)
  934                 bt_mark_probed_iop(bt_board_ports[port]);
  935 }
  936 
  937 void
  938 bt_mark_probed_iop(u_int ioport)
  939 {
  940         u_int i;
  941 
  942         for (i = 0; i < BT_NUM_ISAPORTS; i++) {
  943                 if (ioport == bt_isa_ports[i].addr) {
  944                         bt_isa_ports[i].probed = 1;
  945                         break;
  946                 }
  947         }
  948 }
  949 
  950 void
  951 bt_find_probe_range(int ioport, int *port_index, int *max_port_index)
  952 {
  953         if (ioport > 0) {
  954                 int i;
  955 
  956                 for (i = 0;i < BT_NUM_ISAPORTS; i++)
  957                         if (ioport <= bt_isa_ports[i].addr)
  958                                 break;
  959                 if ((i >= BT_NUM_ISAPORTS)
  960                  || (ioport != bt_isa_ports[i].addr)) {
  961                         printf(
  962 "bt_find_probe_range: Invalid baseport of 0x%x specified.\n"
  963 "bt_find_probe_range: Nearest valid baseport is 0x%x.\n"
  964 "bt_find_probe_range: Failing probe.\n",
  965                                ioport,
  966                                (i < BT_NUM_ISAPORTS)
  967                                     ? bt_isa_ports[i].addr
  968                                     : bt_isa_ports[BT_NUM_ISAPORTS - 1].addr);
  969                         *port_index = *max_port_index = -1;
  970                         return;
  971                 }
  972                 *port_index = *max_port_index = bt_isa_ports[i].bio;
  973         } else {
  974                 *port_index = 0;
  975                 *max_port_index = BT_NUM_ISAPORTS - 1;
  976         }
  977 }
  978 
  979 int
  980 bt_iop_from_bio(isa_compat_io_t bio_index)
  981 {
  982         if (bio_index < BT_NUM_ISAPORTS)
  983                 return (bt_board_ports[bio_index]);
  984         return (-1);
  985 }
  986 
  987 
  988 static void
  989 btallocccbs(struct bt_softc *bt)
  990 {
  991         struct bt_ccb *next_ccb;
  992         struct sg_map_node *sg_map;
  993         bus_addr_t physaddr;
  994         bt_sg_t *segs;
  995         int newcount;
  996         int i;
  997 
  998         if (bt->num_ccbs >= bt->max_ccbs)
  999                 /* Can't allocate any more */
 1000                 return;
 1001 
 1002         next_ccb = &bt->bt_ccb_array[bt->num_ccbs];
 1003 
 1004         sg_map = malloc(sizeof(*sg_map), M_DEVBUF, M_NOWAIT);
 1005 
 1006         if (sg_map == NULL)
 1007                 goto error_exit;
 1008 
 1009         /* Allocate S/G space for the next batch of CCBS */
 1010         if (bus_dmamem_alloc(bt->sg_dmat, (void **)&sg_map->sg_vaddr,
 1011                              BUS_DMA_NOWAIT, &sg_map->sg_dmamap) != 0) {
 1012                 free(sg_map, M_DEVBUF);
 1013                 goto error_exit;
 1014         }
 1015 
 1016         SLIST_INSERT_HEAD(&bt->sg_maps, sg_map, links);
 1017 
 1018         bus_dmamap_load(bt->sg_dmat, sg_map->sg_dmamap, sg_map->sg_vaddr,
 1019                         PAGE_SIZE, btmapsgs, bt, /*flags*/0);
 1020         
 1021         segs = sg_map->sg_vaddr;
 1022         physaddr = sg_map->sg_physaddr;
 1023 
 1024         newcount = (PAGE_SIZE / (BT_NSEG * sizeof(bt_sg_t)));
 1025         for (i = 0; bt->num_ccbs < bt->max_ccbs && i < newcount; i++) {
 1026                 int error;
 1027 
 1028                 next_ccb->sg_list = segs;
 1029                 next_ccb->sg_list_phys = physaddr;
 1030                 next_ccb->flags = BCCB_FREE;
 1031                 callout_init_mtx(&next_ccb->timer, &bt->lock, 0);
 1032                 error = bus_dmamap_create(bt->buffer_dmat, /*flags*/0,
 1033                                           &next_ccb->dmamap);
 1034                 if (error != 0)
 1035                         break;
 1036                 SLIST_INSERT_HEAD(&bt->free_bt_ccbs, next_ccb, links);
 1037                 segs += BT_NSEG;
 1038                 physaddr += (BT_NSEG * sizeof(bt_sg_t));
 1039                 next_ccb++;
 1040                 bt->num_ccbs++;
 1041         }
 1042 
 1043         /* Reserve a CCB for error recovery */
 1044         if (bt->recovery_bccb == NULL) {
 1045                 bt->recovery_bccb = SLIST_FIRST(&bt->free_bt_ccbs);
 1046                 SLIST_REMOVE_HEAD(&bt->free_bt_ccbs, links);
 1047         }
 1048 
 1049         if (SLIST_FIRST(&bt->free_bt_ccbs) != NULL)
 1050                 return;
 1051 
 1052 error_exit:
 1053         device_printf(bt->dev, "Can't malloc BCCBs\n");
 1054 }
 1055 
 1056 static __inline void
 1057 btfreeccb(struct bt_softc *bt, struct bt_ccb *bccb)
 1058 {
 1059 
 1060         if (!dumping)
 1061                 mtx_assert(&bt->lock, MA_OWNED);
 1062         if ((bccb->flags & BCCB_ACTIVE) != 0)
 1063                 LIST_REMOVE(&bccb->ccb->ccb_h, sim_links.le);
 1064         if (bt->resource_shortage != 0
 1065          && (bccb->ccb->ccb_h.status & CAM_RELEASE_SIMQ) == 0) {
 1066                 bccb->ccb->ccb_h.status |= CAM_RELEASE_SIMQ;
 1067                 bt->resource_shortage = FALSE;
 1068         }
 1069         bccb->flags = BCCB_FREE;
 1070         SLIST_INSERT_HEAD(&bt->free_bt_ccbs, bccb, links);
 1071         bt->active_ccbs--;
 1072 }
 1073 
 1074 static __inline struct bt_ccb*
 1075 btgetccb(struct bt_softc *bt)
 1076 {
 1077         struct  bt_ccb* bccb;
 1078 
 1079         if (!dumping)
 1080                 mtx_assert(&bt->lock, MA_OWNED);
 1081         if ((bccb = SLIST_FIRST(&bt->free_bt_ccbs)) != NULL) {
 1082                 SLIST_REMOVE_HEAD(&bt->free_bt_ccbs, links);
 1083                 bt->active_ccbs++;
 1084         } else {
 1085                 btallocccbs(bt);
 1086                 bccb = SLIST_FIRST(&bt->free_bt_ccbs);
 1087                 if (bccb != NULL) {
 1088                         SLIST_REMOVE_HEAD(&bt->free_bt_ccbs, links);
 1089                         bt->active_ccbs++;
 1090                 }
 1091         }
 1092 
 1093         return (bccb);
 1094 }
 1095 
 1096 static void
 1097 btaction(struct cam_sim *sim, union ccb *ccb)
 1098 {
 1099         struct  bt_softc *bt;
 1100 
 1101         CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE, ("btaction\n"));
 1102         
 1103         bt = (struct bt_softc *)cam_sim_softc(sim);
 1104         mtx_assert(&bt->lock, MA_OWNED);
 1105         
 1106         switch (ccb->ccb_h.func_code) {
 1107         /* Common cases first */
 1108         case XPT_SCSI_IO:       /* Execute the requested I/O operation */
 1109         case XPT_RESET_DEV:     /* Bus Device Reset the specified SCSI device */
 1110         {
 1111                 struct  bt_ccb  *bccb;
 1112                 struct  bt_hccb *hccb;
 1113 
 1114                 /*
 1115                  * get a bccb to use.
 1116                  */
 1117                 if ((bccb = btgetccb(bt)) == NULL) {
 1118 
 1119                         bt->resource_shortage = TRUE;
 1120                         xpt_freeze_simq(bt->sim, /*count*/1);
 1121                         ccb->ccb_h.status = CAM_REQUEUE_REQ;
 1122                         xpt_done(ccb);
 1123                         return;
 1124                 }
 1125                 
 1126                 hccb = &bccb->hccb;
 1127 
 1128                 /*
 1129                  * So we can find the BCCB when an abort is requested
 1130                  */
 1131                 bccb->ccb = ccb;
 1132                 ccb->ccb_h.ccb_bccb_ptr = bccb;
 1133                 ccb->ccb_h.ccb_bt_ptr = bt;
 1134 
 1135                 /*
 1136                  * Put all the arguments for the xfer in the bccb
 1137                  */
 1138                 hccb->target_id = ccb->ccb_h.target_id;
 1139                 hccb->target_lun = ccb->ccb_h.target_lun;
 1140                 hccb->btstat = 0;
 1141                 hccb->sdstat = 0;
 1142 
 1143                 if (ccb->ccb_h.func_code == XPT_SCSI_IO) {
 1144                         struct ccb_scsiio *csio;
 1145                         struct ccb_hdr *ccbh;
 1146                         int error;
 1147 
 1148                         csio = &ccb->csio;
 1149                         ccbh = &csio->ccb_h;
 1150                         hccb->opcode = INITIATOR_CCB_WRESID;
 1151                         hccb->datain = (ccb->ccb_h.flags & CAM_DIR_IN) ? 1 : 0;
 1152                         hccb->dataout =(ccb->ccb_h.flags & CAM_DIR_OUT) ? 1 : 0;
 1153                         hccb->cmd_len = csio->cdb_len;
 1154                         if (hccb->cmd_len > sizeof(hccb->scsi_cdb)) {
 1155                                 ccb->ccb_h.status = CAM_REQ_INVALID;
 1156                                 btfreeccb(bt, bccb);
 1157                                 xpt_done(ccb);
 1158                                 return;
 1159                         }
 1160                         hccb->sense_len = csio->sense_len;
 1161                         if ((ccbh->flags & CAM_TAG_ACTION_VALID) != 0
 1162                          && ccb->csio.tag_action != CAM_TAG_ACTION_NONE) {
 1163                                 hccb->tag_enable = TRUE;
 1164                                 hccb->tag_type = (ccb->csio.tag_action & 0x3);
 1165                         } else {
 1166                                 hccb->tag_enable = FALSE;
 1167                                 hccb->tag_type = 0;
 1168                         }
 1169                         if ((ccbh->flags & CAM_CDB_POINTER) != 0) {
 1170                                 if ((ccbh->flags & CAM_CDB_PHYS) == 0) {
 1171                                         bcopy(csio->cdb_io.cdb_ptr,
 1172                                               hccb->scsi_cdb, hccb->cmd_len);
 1173                                 } else {
 1174                                         /* I guess I could map it in... */
 1175                                         ccbh->status = CAM_REQ_INVALID;
 1176                                         btfreeccb(bt, bccb);
 1177                                         xpt_done(ccb);
 1178                                         return;
 1179                                 }
 1180                         } else {
 1181                                 bcopy(csio->cdb_io.cdb_bytes,
 1182                                       hccb->scsi_cdb, hccb->cmd_len);
 1183                         }
 1184                         /* If need be, bounce our sense buffer */
 1185                         if (bt->sense_buffers != NULL) {
 1186                                 hccb->sense_addr = btsensepaddr(bt, bccb);
 1187                         } else {
 1188                                 hccb->sense_addr = vtophys(&csio->sense_data);
 1189                         }
 1190                         /*
 1191                          * If we have any data to send with this command,
 1192                          * map it into bus space.
 1193                          */
 1194                         error = bus_dmamap_load_ccb(
 1195                             bt->buffer_dmat,
 1196                             bccb->dmamap,
 1197                             ccb,
 1198                             btexecuteccb,
 1199                             bccb,
 1200                             /*flags*/0);
 1201                         if (error == EINPROGRESS) {
 1202                                 /*
 1203                                  * So as to maintain ordering, freeze the
 1204                                  * controller queue until our mapping is
 1205                                  * returned.
 1206                                  */
 1207                                 xpt_freeze_simq(bt->sim, 1);
 1208                                 csio->ccb_h.status |= CAM_RELEASE_SIMQ;
 1209                         }
 1210                 } else {
 1211                         hccb->opcode = INITIATOR_BUS_DEV_RESET;
 1212                         /* No data transfer */
 1213                         hccb->datain = TRUE;
 1214                         hccb->dataout = TRUE;
 1215                         hccb->cmd_len = 0;
 1216                         hccb->sense_len = 0;
 1217                         hccb->tag_enable = FALSE;
 1218                         hccb->tag_type = 0;
 1219                         btexecuteccb(bccb, NULL, 0, 0);
 1220                 }
 1221                 break;
 1222         }
 1223         case XPT_ABORT:                 /* Abort the specified CCB */
 1224                 /* XXX Implement */
 1225                 ccb->ccb_h.status = CAM_REQ_INVALID;
 1226                 xpt_done(ccb);
 1227                 break;
 1228         case XPT_SET_TRAN_SETTINGS:
 1229         {
 1230                 /* XXX Implement */
 1231                 ccb->ccb_h.status = CAM_PROVIDE_FAIL;
 1232                 xpt_done(ccb);
 1233                 break;
 1234         }
 1235         case XPT_GET_TRAN_SETTINGS:
 1236         /* Get default/user set transfer settings for the target */
 1237         {
 1238                 struct  ccb_trans_settings *cts;
 1239                 u_int   target_mask;
 1240 
 1241                 cts = &ccb->cts;
 1242                 target_mask = 0x01 << ccb->ccb_h.target_id;
 1243                 if (cts->type == CTS_TYPE_CURRENT_SETTINGS) {
 1244                         struct ccb_trans_settings_scsi *scsi =
 1245                             &cts->proto_specific.scsi;
 1246                         struct ccb_trans_settings_spi *spi =
 1247                             &cts->xport_specific.spi;
 1248                         cts->protocol = PROTO_SCSI;
 1249                         cts->protocol_version = SCSI_REV_2;
 1250                         cts->transport = XPORT_SPI;
 1251                         cts->transport_version = 2;
 1252 
 1253                         scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB;
 1254                         spi->flags &= ~CTS_SPI_FLAGS_DISC_ENB;
 1255 
 1256                         if ((bt->disc_permitted & target_mask) != 0)
 1257                                 spi->flags |= CTS_SPI_FLAGS_DISC_ENB;
 1258                         if ((bt->tags_permitted & target_mask) != 0)
 1259                                 scsi->flags |= CTS_SCSI_FLAGS_TAG_ENB;
 1260 
 1261                         if ((bt->ultra_permitted & target_mask) != 0)
 1262                                 spi->sync_period = 12;
 1263                         else if ((bt->fast_permitted & target_mask) != 0)
 1264                                 spi->sync_period = 25;
 1265                         else if ((bt->sync_permitted & target_mask) != 0)
 1266                                 spi->sync_period = 50;
 1267                         else
 1268                                 spi->sync_period = 0;
 1269 
 1270                         if (spi->sync_period != 0)
 1271                                 spi->sync_offset = 15;
 1272 
 1273                         spi->valid |= CTS_SPI_VALID_SYNC_RATE;
 1274                         spi->valid |= CTS_SPI_VALID_SYNC_OFFSET;
 1275 
 1276                         spi->valid |= CTS_SPI_VALID_BUS_WIDTH;
 1277                         if ((bt->wide_permitted & target_mask) != 0)
 1278                                 spi->bus_width = MSG_EXT_WDTR_BUS_16_BIT;
 1279                         else
 1280                                 spi->bus_width = MSG_EXT_WDTR_BUS_8_BIT;
 1281 
 1282                         if (cts->ccb_h.target_lun != CAM_LUN_WILDCARD) {
 1283                                 scsi->valid = CTS_SCSI_VALID_TQ;
 1284                                 spi->valid |= CTS_SPI_VALID_DISC;
 1285                         } else
 1286                                 scsi->valid = 0;
 1287                 } else {
 1288                         btfetchtransinfo(bt, cts);
 1289                 }
 1290 
 1291                 ccb->ccb_h.status = CAM_REQ_CMP;
 1292                 xpt_done(ccb);
 1293                 break;
 1294         }
 1295         case XPT_CALC_GEOMETRY:
 1296         {
 1297                 struct    ccb_calc_geometry *ccg;
 1298                 u_int32_t size_mb;
 1299                 u_int32_t secs_per_cylinder;
 1300 
 1301                 ccg = &ccb->ccg;
 1302                 size_mb = ccg->volume_size
 1303                         / ((1024L * 1024L) / ccg->block_size);
 1304                 
 1305                 if (size_mb >= 1024 && (bt->extended_trans != 0)) {
 1306                         if (size_mb >= 2048) {
 1307                                 ccg->heads = 255;
 1308                                 ccg->secs_per_track = 63;
 1309                         } else {
 1310                                 ccg->heads = 128;
 1311                                 ccg->secs_per_track = 32;
 1312                         }
 1313                 } else {
 1314                         ccg->heads = 64;
 1315                         ccg->secs_per_track = 32;
 1316                 }
 1317                 secs_per_cylinder = ccg->heads * ccg->secs_per_track;
 1318                 ccg->cylinders = ccg->volume_size / secs_per_cylinder;
 1319                 ccb->ccb_h.status = CAM_REQ_CMP;
 1320                 xpt_done(ccb);
 1321                 break;
 1322         }
 1323         case XPT_RESET_BUS:             /* Reset the specified SCSI bus */
 1324         {
 1325                 btreset(bt, /*hardreset*/TRUE);
 1326                 ccb->ccb_h.status = CAM_REQ_CMP;
 1327                 xpt_done(ccb);
 1328                 break;
 1329         }
 1330         case XPT_TERM_IO:               /* Terminate the I/O process */
 1331                 /* XXX Implement */
 1332                 ccb->ccb_h.status = CAM_REQ_INVALID;
 1333                 xpt_done(ccb);
 1334                 break;
 1335         case XPT_PATH_INQ:              /* Path routing inquiry */
 1336         {
 1337                 struct ccb_pathinq *cpi = &ccb->cpi;
 1338                 
 1339                 cpi->version_num = 1; /* XXX??? */
 1340                 cpi->hba_inquiry = PI_SDTR_ABLE;
 1341                 if (bt->tag_capable != 0)
 1342                         cpi->hba_inquiry |= PI_TAG_ABLE;
 1343                 if (bt->wide_bus != 0)
 1344                         cpi->hba_inquiry |= PI_WIDE_16;
 1345                 cpi->target_sprt = 0;
 1346                 cpi->hba_misc = 0;
 1347                 cpi->hba_eng_cnt = 0;
 1348                 cpi->max_target = bt->wide_bus ? 15 : 7;
 1349                 cpi->max_lun = 7;
 1350                 cpi->initiator_id = bt->scsi_id;
 1351                 cpi->bus_id = cam_sim_bus(sim);
 1352                 cpi->base_transfer_speed = 3300;
 1353                 strlcpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
 1354                 strlcpy(cpi->hba_vid, "BusLogic", HBA_IDLEN);
 1355                 strlcpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN);
 1356                 cpi->unit_number = cam_sim_unit(sim);
 1357                 cpi->ccb_h.status = CAM_REQ_CMP;
 1358                 cpi->transport = XPORT_SPI;
 1359                 cpi->transport_version = 2;
 1360                 cpi->protocol = PROTO_SCSI;
 1361                 cpi->protocol_version = SCSI_REV_2;
 1362                 xpt_done(ccb);
 1363                 break;
 1364         }
 1365         default:
 1366                 ccb->ccb_h.status = CAM_REQ_INVALID;
 1367                 xpt_done(ccb);
 1368                 break;
 1369         }
 1370 }
 1371 
 1372 static void
 1373 btexecuteccb(void *arg, bus_dma_segment_t *dm_segs, int nseg, int error)
 1374 {
 1375         struct   bt_ccb *bccb;
 1376         union    ccb *ccb;
 1377         struct   bt_softc *bt;
 1378 
 1379         bccb = (struct bt_ccb *)arg;
 1380         ccb = bccb->ccb;
 1381         bt = (struct bt_softc *)ccb->ccb_h.ccb_bt_ptr;
 1382 
 1383         if (error != 0) {
 1384                 if (error != EFBIG)
 1385                         device_printf(bt->dev,
 1386                                       "Unexepected error 0x%x returned from "
 1387                                       "bus_dmamap_load\n", error);
 1388                 if (ccb->ccb_h.status == CAM_REQ_INPROG) {
 1389                         xpt_freeze_devq(ccb->ccb_h.path, /*count*/1);
 1390                         ccb->ccb_h.status = CAM_REQ_TOO_BIG|CAM_DEV_QFRZN;
 1391                 }
 1392                 btfreeccb(bt, bccb);
 1393                 xpt_done(ccb);
 1394                 return;
 1395         }
 1396                 
 1397         if (nseg != 0) {
 1398                 bt_sg_t *sg;
 1399                 bus_dma_segment_t *end_seg;
 1400                 bus_dmasync_op_t op;
 1401 
 1402                 end_seg = dm_segs + nseg;
 1403 
 1404                 /* Copy the segments into our SG list */
 1405                 sg = bccb->sg_list;
 1406                 while (dm_segs < end_seg) {
 1407                         sg->len = dm_segs->ds_len;
 1408                         sg->addr = dm_segs->ds_addr;
 1409                         sg++;
 1410                         dm_segs++;
 1411                 }
 1412 
 1413                 if (nseg > 1) {
 1414                         bccb->hccb.opcode = INITIATOR_SG_CCB_WRESID;
 1415                         bccb->hccb.data_len = sizeof(bt_sg_t) * nseg;
 1416                         bccb->hccb.data_addr = bccb->sg_list_phys;
 1417                 } else {
 1418                         bccb->hccb.data_len = bccb->sg_list->len;
 1419                         bccb->hccb.data_addr = bccb->sg_list->addr;
 1420                 }
 1421 
 1422                 if ((ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN)
 1423                         op = BUS_DMASYNC_PREREAD;
 1424                 else
 1425                         op = BUS_DMASYNC_PREWRITE;
 1426 
 1427                 bus_dmamap_sync(bt->buffer_dmat, bccb->dmamap, op);
 1428 
 1429         } else {
 1430                 bccb->hccb.opcode = INITIATOR_CCB;
 1431                 bccb->hccb.data_len = 0;
 1432                 bccb->hccb.data_addr = 0;
 1433         }
 1434 
 1435         /*
 1436          * Last time we need to check if this CCB needs to
 1437          * be aborted.
 1438          */
 1439         if (ccb->ccb_h.status != CAM_REQ_INPROG) {
 1440                 if (nseg != 0)
 1441                         bus_dmamap_unload(bt->buffer_dmat, bccb->dmamap);
 1442                 btfreeccb(bt, bccb);
 1443                 xpt_done(ccb);
 1444                 return;
 1445         }
 1446                 
 1447         bccb->flags = BCCB_ACTIVE;
 1448         ccb->ccb_h.status |= CAM_SIM_QUEUED;
 1449         LIST_INSERT_HEAD(&bt->pending_ccbs, &ccb->ccb_h, sim_links.le);
 1450 
 1451         callout_reset_sbt(&bccb->timer, SBT_1MS * ccb->ccb_h.timeout, 0,
 1452             bttimeout, bccb, 0);
 1453 
 1454         /* Tell the adapter about this command */
 1455         bt->cur_outbox->ccb_addr = btccbvtop(bt, bccb);
 1456         if (bt->cur_outbox->action_code != BMBO_FREE) {
 1457                 /*
 1458                  * We should never encounter a busy mailbox.
 1459                  * If we do, warn the user, and treat it as
 1460                  * a resource shortage.  If the controller is
 1461                  * hung, one of the pending transactions will
 1462                  * timeout causing us to start recovery operations.
 1463                  */
 1464                 device_printf(bt->dev,
 1465                               "Encountered busy mailbox with %d out of %d "
 1466                               "commands active!!!\n", bt->active_ccbs,
 1467                               bt->max_ccbs);
 1468                 callout_stop(&bccb->timer);
 1469                 if (nseg != 0)
 1470                         bus_dmamap_unload(bt->buffer_dmat, bccb->dmamap);
 1471                 btfreeccb(bt, bccb);
 1472                 bt->resource_shortage = TRUE;
 1473                 xpt_freeze_simq(bt->sim, /*count*/1);
 1474                 ccb->ccb_h.status = CAM_REQUEUE_REQ;
 1475                 xpt_done(ccb);
 1476                 return;
 1477         }
 1478         bt->cur_outbox->action_code = BMBO_START;       
 1479         bt_outb(bt, COMMAND_REG, BOP_START_MBOX);
 1480         btnextoutbox(bt);
 1481 }
 1482 
 1483 void
 1484 bt_intr(void *arg)
 1485 {
 1486         struct  bt_softc *bt;
 1487 
 1488         bt = arg;
 1489         mtx_lock(&bt->lock);
 1490         bt_intr_locked(bt);
 1491         mtx_unlock(&bt->lock);
 1492 }
 1493 
 1494 void
 1495 bt_intr_locked(struct bt_softc *bt)
 1496 {
 1497         u_int   intstat;
 1498 
 1499         while (((intstat = bt_inb(bt, INTSTAT_REG)) & INTR_PENDING) != 0) {
 1500 
 1501                 if ((intstat & CMD_COMPLETE) != 0) {
 1502                         bt->latched_status = bt_inb(bt, STATUS_REG);
 1503                         bt->command_cmp = TRUE;
 1504                 }
 1505 
 1506                 bt_outb(bt, CONTROL_REG, RESET_INTR);
 1507 
 1508                 if ((intstat & IMB_LOADED) != 0) {
 1509                         while (bt->cur_inbox->comp_code != BMBI_FREE) {
 1510                                 btdone(bt,
 1511                                        btccbptov(bt, bt->cur_inbox->ccb_addr),
 1512                                        bt->cur_inbox->comp_code);
 1513                                 bt->cur_inbox->comp_code = BMBI_FREE;
 1514                                 btnextinbox(bt);
 1515                         }
 1516                 }
 1517 
 1518                 if ((intstat & SCSI_BUS_RESET) != 0) {
 1519                         btreset(bt, /*hardreset*/FALSE);
 1520                 }
 1521         }
 1522 }
 1523 
 1524 static void
 1525 btdone(struct bt_softc *bt, struct bt_ccb *bccb, bt_mbi_comp_code_t comp_code)
 1526 {
 1527         union  ccb        *ccb;
 1528         struct ccb_scsiio *csio;
 1529 
 1530         ccb = bccb->ccb;
 1531         csio = &bccb->ccb->csio;
 1532 
 1533         if ((bccb->flags & BCCB_ACTIVE) == 0) {
 1534                 device_printf(bt->dev,
 1535                               "btdone - Attempt to free non-active BCCB %p\n",
 1536                               (void *)bccb);
 1537                 return;
 1538         }
 1539 
 1540         if ((ccb->ccb_h.flags & CAM_DIR_MASK) != CAM_DIR_NONE) {
 1541                 bus_dmasync_op_t op;
 1542 
 1543                 if ((ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN)
 1544                         op = BUS_DMASYNC_POSTREAD;
 1545                 else
 1546                         op = BUS_DMASYNC_POSTWRITE;
 1547                 bus_dmamap_sync(bt->buffer_dmat, bccb->dmamap, op);
 1548                 bus_dmamap_unload(bt->buffer_dmat, bccb->dmamap);
 1549         }
 1550 
 1551         if (bccb == bt->recovery_bccb) {
 1552                 /*
 1553                  * The recovery BCCB does not have a CCB associated
 1554                  * with it, so short circuit the normal error handling.
 1555                  * We now traverse our list of pending CCBs and process
 1556                  * any that were terminated by the recovery CCBs action.
 1557                  * We also reinstate timeouts for all remaining, pending,
 1558                  * CCBs.
 1559                  */
 1560                 struct cam_path *path;
 1561                 struct ccb_hdr *ccb_h;
 1562                 cam_status error;
 1563 
 1564                 /* Notify all clients that a BDR occurred */
 1565                 error = xpt_create_path(&path, /*periph*/NULL,
 1566                                         cam_sim_path(bt->sim),
 1567                                         bccb->hccb.target_id,
 1568                                         CAM_LUN_WILDCARD);
 1569                 
 1570                 if (error == CAM_REQ_CMP) {
 1571                         xpt_async(AC_SENT_BDR, path, NULL);
 1572                         xpt_free_path(path);
 1573                 }
 1574 
 1575                 ccb_h = LIST_FIRST(&bt->pending_ccbs);
 1576                 while (ccb_h != NULL) {
 1577                         struct bt_ccb *pending_bccb;
 1578 
 1579                         pending_bccb = (struct bt_ccb *)ccb_h->ccb_bccb_ptr;
 1580                         if (pending_bccb->hccb.target_id
 1581                          == bccb->hccb.target_id) {
 1582                                 pending_bccb->hccb.btstat = BTSTAT_HA_BDR;
 1583                                 ccb_h = LIST_NEXT(ccb_h, sim_links.le);
 1584                                 btdone(bt, pending_bccb, BMBI_ERROR);
 1585                         } else {
 1586                                 callout_reset_sbt(&pending_bccb->timer,
 1587                                     SBT_1MS * ccb_h->timeout, 0, bttimeout,
 1588                                     pending_bccb, 0);
 1589                                 ccb_h = LIST_NEXT(ccb_h, sim_links.le);
 1590                         }
 1591                 }
 1592                 device_printf(bt->dev, "No longer in timeout\n");
 1593                 return;
 1594         }
 1595 
 1596         callout_stop(&bccb->timer);
 1597 
 1598         switch (comp_code) {
 1599         case BMBI_FREE:
 1600                 device_printf(bt->dev,
 1601                               "btdone - CCB completed with free status!\n");
 1602                 break;
 1603         case BMBI_NOT_FOUND:
 1604                 device_printf(bt->dev,
 1605                               "btdone - CCB Abort failed to find CCB\n");
 1606                 break;
 1607         case BMBI_ABORT:
 1608         case BMBI_ERROR:
 1609                 if (bootverbose) {
 1610                         printf("bt: ccb %p - error %x occurred.  "
 1611                                "btstat = %x, sdstat = %x\n",
 1612                                (void *)bccb, comp_code, bccb->hccb.btstat,
 1613                                bccb->hccb.sdstat);
 1614                 }
 1615                 /* An error occurred */
 1616                 switch(bccb->hccb.btstat) {
 1617                 case BTSTAT_DATARUN_ERROR:
 1618                         if (bccb->hccb.data_len == 0) {
 1619                                 /*
 1620                                  * At least firmware 4.22, does this
 1621                                  * for a QUEUE FULL condition.
 1622                                  */
 1623                                 bccb->hccb.sdstat = SCSI_STATUS_QUEUE_FULL;
 1624                         } else if (bccb->hccb.data_len < 0) {
 1625                                 csio->ccb_h.status = CAM_DATA_RUN_ERR;
 1626                                 break;
 1627                         }
 1628                         /* FALLTHROUGH */
 1629                 case BTSTAT_NOERROR:
 1630                 case BTSTAT_LINKED_CMD_COMPLETE:
 1631                 case BTSTAT_LINKED_CMD_FLAG_COMPLETE:
 1632                 case BTSTAT_DATAUNDERUN_ERROR:
 1633 
 1634                         csio->scsi_status = bccb->hccb.sdstat;
 1635                         csio->ccb_h.status |= CAM_SCSI_STATUS_ERROR;
 1636                         switch(csio->scsi_status) {
 1637                         case SCSI_STATUS_CHECK_COND:
 1638                         case SCSI_STATUS_CMD_TERMINATED:
 1639                                 csio->ccb_h.status |= CAM_AUTOSNS_VALID;
 1640                                 /* Bounce sense back if necessary */
 1641                                 if (bt->sense_buffers != NULL) {
 1642                                         csio->sense_data =
 1643                                             *btsensevaddr(bt, bccb);
 1644                                 }
 1645                                 break;
 1646                         default:
 1647                                 break;
 1648                         case SCSI_STATUS_OK:
 1649                                 csio->ccb_h.status = CAM_REQ_CMP;
 1650                                 break;
 1651                         }
 1652                         csio->resid = bccb->hccb.data_len;
 1653                         break;
 1654                 case BTSTAT_SELTIMEOUT:
 1655                         csio->ccb_h.status = CAM_SEL_TIMEOUT;
 1656                         break;
 1657                 case BTSTAT_UNEXPECTED_BUSFREE:
 1658                         csio->ccb_h.status = CAM_UNEXP_BUSFREE;
 1659                         break;
 1660                 case BTSTAT_INVALID_PHASE:
 1661                         csio->ccb_h.status = CAM_SEQUENCE_FAIL;
 1662                         break;
 1663                 case BTSTAT_INVALID_ACTION_CODE:
 1664                         panic("%s: Inavlid Action code", bt_name(bt));
 1665                         break;
 1666                 case BTSTAT_INVALID_OPCODE:
 1667                         panic("%s: Inavlid CCB Opcode code", bt_name(bt));
 1668                         break;
 1669                 case BTSTAT_LINKED_CCB_LUN_MISMATCH:
 1670                         /* We don't even support linked commands... */
 1671                         panic("%s: Linked CCB Lun Mismatch", bt_name(bt));
 1672                         break;
 1673                 case BTSTAT_INVALID_CCB_OR_SG_PARAM:
 1674                         panic("%s: Invalid CCB or SG list", bt_name(bt));
 1675                         break;
 1676                 case BTSTAT_AUTOSENSE_FAILED:
 1677                         csio->ccb_h.status = CAM_AUTOSENSE_FAIL;
 1678                         break;
 1679                 case BTSTAT_TAGGED_MSG_REJECTED:
 1680                 {
 1681                         struct ccb_trans_settings neg; 
 1682                         struct ccb_trans_settings_scsi *scsi =
 1683                             &neg.proto_specific.scsi;
 1684 
 1685                         neg.protocol = PROTO_SCSI;
 1686                         neg.protocol_version = SCSI_REV_2;
 1687                         neg.transport = XPORT_SPI;
 1688                         neg.transport_version = 2;
 1689                         scsi->valid = CTS_SCSI_VALID_TQ;
 1690                         scsi->flags = 0;
 1691                         xpt_print_path(csio->ccb_h.path);
 1692                         printf("refuses tagged commands.  Performing "
 1693                                "non-tagged I/O\n");
 1694                         xpt_setup_ccb(&neg.ccb_h, csio->ccb_h.path,
 1695                                       /*priority*/1); 
 1696                         xpt_async(AC_TRANSFER_NEG, csio->ccb_h.path, &neg);
 1697                         bt->tags_permitted &= ~(0x01 << csio->ccb_h.target_id);
 1698                         csio->ccb_h.status = CAM_MSG_REJECT_REC;
 1699                         break;
 1700                 }
 1701                 case BTSTAT_UNSUPPORTED_MSG_RECEIVED:
 1702                         /*
 1703                          * XXX You would think that this is
 1704                          *     a recoverable error... Hmmm.
 1705                          */
 1706                         csio->ccb_h.status = CAM_REQ_CMP_ERR;
 1707                         break;
 1708                 case BTSTAT_HA_SOFTWARE_ERROR:
 1709                 case BTSTAT_HA_WATCHDOG_ERROR:
 1710                 case BTSTAT_HARDWARE_FAILURE:
 1711                         /* Hardware reset ??? Can we recover ??? */
 1712                         csio->ccb_h.status = CAM_NO_HBA;
 1713                         break;
 1714                 case BTSTAT_TARGET_IGNORED_ATN:
 1715                 case BTSTAT_OTHER_SCSI_BUS_RESET:
 1716                 case BTSTAT_HA_SCSI_BUS_RESET:
 1717                         if ((csio->ccb_h.status & CAM_STATUS_MASK)
 1718                          != CAM_CMD_TIMEOUT)
 1719                                 csio->ccb_h.status = CAM_SCSI_BUS_RESET;
 1720                         break;
 1721                 case BTSTAT_HA_BDR:
 1722                         if ((bccb->flags & BCCB_DEVICE_RESET) == 0)
 1723                                 csio->ccb_h.status = CAM_BDR_SENT;
 1724                         else
 1725                                 csio->ccb_h.status = CAM_CMD_TIMEOUT;
 1726                         break;
 1727                 case BTSTAT_INVALID_RECONNECT:
 1728                 case BTSTAT_ABORT_QUEUE_GENERATED:
 1729                         csio->ccb_h.status = CAM_REQ_TERMIO;
 1730                         break;
 1731                 case BTSTAT_SCSI_PERROR_DETECTED:
 1732                         csio->ccb_h.status = CAM_UNCOR_PARITY;
 1733                         break;
 1734                 }
 1735                 if (csio->ccb_h.status != CAM_REQ_CMP) {
 1736                         xpt_freeze_devq(csio->ccb_h.path, /*count*/1);
 1737                         csio->ccb_h.status |= CAM_DEV_QFRZN;
 1738                 }
 1739                 if ((bccb->flags & BCCB_RELEASE_SIMQ) != 0)
 1740                         ccb->ccb_h.status |= CAM_RELEASE_SIMQ;
 1741                 btfreeccb(bt, bccb);
 1742                 xpt_done(ccb);
 1743                 break;
 1744         case BMBI_OK:
 1745                 /* All completed without incident */
 1746                 ccb->ccb_h.status |= CAM_REQ_CMP;
 1747                 if ((bccb->flags & BCCB_RELEASE_SIMQ) != 0)
 1748                         ccb->ccb_h.status |= CAM_RELEASE_SIMQ;
 1749                 btfreeccb(bt, bccb);
 1750                 xpt_done(ccb);
 1751                 break;
 1752         }
 1753 }
 1754 
 1755 static int
 1756 btreset(struct bt_softc* bt, int hard_reset)
 1757 {
 1758         struct   ccb_hdr *ccb_h;
 1759         u_int    status;
 1760         u_int    timeout;
 1761         u_int8_t reset_type;
 1762 
 1763         if (hard_reset != 0)
 1764                 reset_type = HARD_RESET;
 1765         else
 1766                 reset_type = SOFT_RESET;
 1767         bt_outb(bt, CONTROL_REG, reset_type);
 1768 
 1769         /* Wait 5sec. for Diagnostic start */
 1770         timeout = 5 * 10000;
 1771         while (--timeout) {
 1772                 status = bt_inb(bt, STATUS_REG);
 1773                 if ((status & DIAG_ACTIVE) != 0)
 1774                         break;
 1775                 DELAY(100);
 1776         }
 1777         if (timeout == 0) {
 1778                 if (bootverbose)
 1779                         device_printf(bt->dev,
 1780                             "btreset - Diagnostic Active failed to "
 1781                             "assert. status = 0x%x\n", status);
 1782                 return (ETIMEDOUT);
 1783         }
 1784 
 1785         /* Wait 10sec. for Diagnostic end */
 1786         timeout = 10 * 10000;
 1787         while (--timeout) {
 1788                 status = bt_inb(bt, STATUS_REG);
 1789                 if ((status & DIAG_ACTIVE) == 0)
 1790                         break;
 1791                 DELAY(100);
 1792         }
 1793         if (timeout == 0) {
 1794                 panic("%s: btreset - Diagnostic Active failed to drop. "
 1795                        "status = 0x%x\n", bt_name(bt), status);
 1796                 return (ETIMEDOUT);
 1797         }
 1798 
 1799         /* Wait for the host adapter to become ready or report a failure */
 1800         timeout = 10000;
 1801         while (--timeout) {
 1802                 status = bt_inb(bt, STATUS_REG);
 1803                 if ((status & (DIAG_FAIL|HA_READY|DATAIN_REG_READY)) != 0)
 1804                         break;
 1805                 DELAY(100);
 1806         }
 1807         if (timeout == 0) {
 1808                 device_printf(bt->dev,
 1809                     "btreset - Host adapter failed to come ready. "
 1810                     "status = 0x%x\n", status);
 1811                 return (ETIMEDOUT);
 1812         }
 1813 
 1814         /* If the diagnostics failed, tell the user */
 1815         if ((status & DIAG_FAIL) != 0
 1816          || (status & HA_READY) == 0) {
 1817                 device_printf(bt->dev,
 1818                     "btreset - Adapter failed diagnostics\n");
 1819 
 1820                 if ((status & DATAIN_REG_READY) != 0)
 1821                         device_printf(bt->dev,
 1822                             "btreset - Host Adapter Error code = 0x%x\n",
 1823                             bt_inb(bt, DATAIN_REG));
 1824                 return (ENXIO);
 1825         }
 1826 
 1827         /* If we've allocated mailboxes, initialize them */
 1828         if (bt->init_level > 4)
 1829                 btinitmboxes(bt);
 1830 
 1831         /* If we've attached to the XPT, tell it about the event */
 1832         if (bt->path != NULL)
 1833                 xpt_async(AC_BUS_RESET, bt->path, NULL);
 1834 
 1835         /*
 1836          * Perform completion processing for all outstanding CCBs.
 1837          */
 1838         while ((ccb_h = LIST_FIRST(&bt->pending_ccbs)) != NULL) {
 1839                 struct bt_ccb *pending_bccb;
 1840 
 1841                 pending_bccb = (struct bt_ccb *)ccb_h->ccb_bccb_ptr;
 1842                 pending_bccb->hccb.btstat = BTSTAT_HA_SCSI_BUS_RESET;
 1843                 btdone(bt, pending_bccb, BMBI_ERROR);
 1844         }
 1845 
 1846         return (0);
 1847 }
 1848 
 1849 /*
 1850  * Send a command to the adapter.
 1851  */
 1852 int
 1853 bt_cmd(struct bt_softc *bt, bt_op_t opcode, u_int8_t *params, u_int param_len,
 1854       u_int8_t *reply_data, u_int reply_len, u_int cmd_timeout)
 1855 {
 1856         u_int   timeout;
 1857         u_int   status;
 1858         u_int   saved_status;
 1859         u_int   intstat;
 1860         u_int   reply_buf_size;
 1861         int     cmd_complete;
 1862         int     error;
 1863 
 1864         /* No data returned to start */
 1865         reply_buf_size = reply_len;
 1866         reply_len = 0;
 1867         intstat = 0;
 1868         cmd_complete = 0;
 1869         saved_status = 0;
 1870         error = 0;
 1871 
 1872         bt->command_cmp = 0;
 1873         /*
 1874          * Wait up to 10 sec. for the adapter to become
 1875          * ready to accept commands.
 1876          */
 1877         timeout = 100000;
 1878         while (--timeout) {
 1879                 status = bt_inb(bt, STATUS_REG);
 1880                 if ((status & HA_READY) != 0
 1881                  && (status & CMD_REG_BUSY) == 0)
 1882                         break;
 1883                 /*
 1884                  * Throw away any pending data which may be
 1885                  * left over from earlier commands that we
 1886                  * timedout on.
 1887                  */
 1888                 if ((status & DATAIN_REG_READY) != 0)
 1889                         (void)bt_inb(bt, DATAIN_REG);
 1890                 DELAY(100);
 1891         }
 1892         if (timeout == 0) {
 1893                 device_printf(bt->dev,
 1894                     "bt_cmd: Timeout waiting for adapter ready, "
 1895                     "status = 0x%x\n", status);
 1896                 return (ETIMEDOUT);
 1897         }
 1898 
 1899         /*
 1900          * Send the opcode followed by any necessary parameter bytes.
 1901          */
 1902         bt_outb(bt, COMMAND_REG, opcode);
 1903 
 1904         /*
 1905          * Wait for up to 1sec for each byte of the
 1906          * parameter list sent to be sent.
 1907          */
 1908         timeout = 10000;
 1909         while (param_len && --timeout) {
 1910                 DELAY(100);
 1911                 status = bt_inb(bt, STATUS_REG);
 1912                 intstat = bt_inb(bt, INTSTAT_REG);
 1913         
 1914                 if ((intstat & (INTR_PENDING|CMD_COMPLETE))
 1915                  == (INTR_PENDING|CMD_COMPLETE)) {
 1916                         saved_status = status;
 1917                         cmd_complete = 1;
 1918                         break;
 1919                 }
 1920                 if (bt->command_cmp != 0) {
 1921                         saved_status = bt->latched_status;
 1922                         cmd_complete = 1;
 1923                         break;
 1924                 }
 1925                 if ((status & DATAIN_REG_READY) != 0)
 1926                         break;
 1927                 if ((status & CMD_REG_BUSY) == 0) {
 1928                         bt_outb(bt, COMMAND_REG, *params++);
 1929                         param_len--;
 1930                         timeout = 10000;
 1931                 }
 1932         }
 1933         if (timeout == 0) {
 1934                 device_printf(bt->dev, "bt_cmd: Timeout sending parameters, "
 1935                     "status = 0x%x\n", status);
 1936                 cmd_complete = 1;
 1937                 saved_status = status;
 1938                 error = ETIMEDOUT;
 1939         }
 1940 
 1941         /*
 1942          * Wait for the command to complete.
 1943          */
 1944         while (cmd_complete == 0 && --cmd_timeout) {
 1945 
 1946                 status = bt_inb(bt, STATUS_REG);
 1947                 intstat = bt_inb(bt, INTSTAT_REG);
 1948                 /*
 1949                  * It may be that this command was issued with
 1950                  * controller interrupts disabled.  We'll never
 1951                  * get to our command if an incoming mailbox
 1952                  * interrupt is pending, so take care of completed
 1953                  * mailbox commands by calling our interrupt handler.
 1954                  */
 1955                 if ((intstat & (INTR_PENDING|IMB_LOADED))
 1956                  == (INTR_PENDING|IMB_LOADED))
 1957                         bt_intr_locked(bt);
 1958 
 1959                 if (bt->command_cmp != 0) {
 1960                         /*
 1961                          * Our interrupt handler saw CMD_COMPLETE
 1962                          * status before we did.
 1963                          */
 1964                         cmd_complete = 1;
 1965                         saved_status = bt->latched_status;
 1966                 } else if ((intstat & (INTR_PENDING|CMD_COMPLETE))
 1967                         == (INTR_PENDING|CMD_COMPLETE)) {
 1968                         /*
 1969                          * Our poll (in case interrupts are blocked)
 1970                          * saw the CMD_COMPLETE interrupt.
 1971                          */
 1972                         cmd_complete = 1;
 1973                         saved_status = status;
 1974                 } else if (opcode == BOP_MODIFY_IO_ADDR
 1975                         && (status & CMD_REG_BUSY) == 0) {
 1976                         /*
 1977                          * The BOP_MODIFY_IO_ADDR does not issue a CMD_COMPLETE,
 1978                          * but it should update the status register.  So, we
 1979                          * consider this command complete when the CMD_REG_BUSY
 1980                          * status clears.
 1981                          */
 1982                         saved_status = status;
 1983                         cmd_complete = 1;
 1984                 } else if ((status & DATAIN_REG_READY) != 0) {
 1985                         u_int8_t data;
 1986 
 1987                         data = bt_inb(bt, DATAIN_REG);
 1988                         if (reply_len < reply_buf_size) {
 1989                                 *reply_data++ = data;
 1990                         } else {
 1991                                 device_printf(bt->dev,
 1992                                     "bt_cmd - Discarded reply data byte "
 1993                                     "for opcode 0x%x\n", opcode);
 1994                         }
 1995                         /*
 1996                          * Reset timeout to ensure at least a second
 1997                          * between response bytes.
 1998                          */
 1999                         cmd_timeout = MAX(cmd_timeout, 10000);
 2000                         reply_len++;
 2001 
 2002                 } else if ((opcode == BOP_FETCH_LRAM)
 2003                         && (status & HA_READY) != 0) {
 2004                                 saved_status = status;
 2005                                 cmd_complete = 1;
 2006                 }
 2007                 DELAY(100);
 2008         }
 2009         if (cmd_timeout == 0) {
 2010                 device_printf(bt->dev,
 2011                     "bt_cmd: Timeout waiting for command (%x) "
 2012                     "to complete.\n", opcode);
 2013                 device_printf(bt->dev, "status = 0x%x, intstat = 0x%x, "
 2014                     "rlen %d\n", status, intstat, reply_len);
 2015                 error = (ETIMEDOUT);
 2016         }
 2017 
 2018         /*
 2019          * Clear any pending interrupts.
 2020          */
 2021         bt_intr_locked(bt);
 2022         
 2023         if (error != 0)
 2024                 return (error);
 2025 
 2026         /*
 2027          * If the command was rejected by the controller, tell the caller.
 2028          */
 2029         if ((saved_status & CMD_INVALID) != 0) {
 2030                 /*
 2031                  * Some early adapters may not recover properly from
 2032                  * an invalid command.  If it appears that the controller
 2033                  * has wedged (i.e. status was not cleared by our interrupt
 2034                  * reset above), perform a soft reset.
 2035                  */
 2036                 if (bootverbose)
 2037                         device_printf(bt->dev, "Invalid Command 0x%x\n",
 2038                                 opcode);
 2039                 DELAY(1000);
 2040                 status = bt_inb(bt, STATUS_REG);
 2041                 if ((status & (CMD_INVALID|STATUS_REG_RSVD|DATAIN_REG_READY|
 2042                               CMD_REG_BUSY|DIAG_FAIL|DIAG_ACTIVE)) != 0
 2043                  || (status & (HA_READY|INIT_REQUIRED))
 2044                   != (HA_READY|INIT_REQUIRED)) {
 2045                         btreset(bt, /*hard_reset*/FALSE);
 2046                 }
 2047                 return (EINVAL);
 2048         }
 2049 
 2050         if (param_len > 0) {
 2051                 /* The controller did not accept the full argument list */
 2052                 return (E2BIG);
 2053         }
 2054 
 2055         if (reply_len != reply_buf_size) {
 2056                 /* Too much or too little data received */
 2057                 return (EMSGSIZE);
 2058         }
 2059 
 2060         /* We were successful */
 2061         return (0);
 2062 }
 2063 
 2064 static int
 2065 btinitmboxes(struct bt_softc *bt) {
 2066         init_32b_mbox_params_t init_mbox;
 2067         int error;
 2068 
 2069         bzero(bt->in_boxes, sizeof(bt_mbox_in_t) * bt->num_boxes);
 2070         bzero(bt->out_boxes, sizeof(bt_mbox_out_t) * bt->num_boxes);
 2071         bt->cur_inbox = bt->in_boxes;
 2072         bt->last_inbox = bt->in_boxes + bt->num_boxes - 1;
 2073         bt->cur_outbox = bt->out_boxes;
 2074         bt->last_outbox = bt->out_boxes + bt->num_boxes - 1;
 2075 
 2076         /* Tell the adapter about them */
 2077         init_mbox.num_boxes = bt->num_boxes;
 2078         init_mbox.base_addr[0] = bt->mailbox_physbase & 0xFF;
 2079         init_mbox.base_addr[1] = (bt->mailbox_physbase >> 8) & 0xFF;
 2080         init_mbox.base_addr[2] = (bt->mailbox_physbase >> 16) & 0xFF;
 2081         init_mbox.base_addr[3] = (bt->mailbox_physbase >> 24) & 0xFF;
 2082         error = bt_cmd(bt, BOP_INITIALIZE_32BMBOX, (u_int8_t *)&init_mbox,
 2083                        /*parmlen*/sizeof(init_mbox), /*reply_buf*/NULL,
 2084                        /*reply_len*/0, DEFAULT_CMD_TIMEOUT);
 2085 
 2086         if (error != 0)
 2087                 printf("btinitmboxes: Initialization command failed\n");
 2088         else if (bt->strict_rr != 0) {
 2089                 /*
 2090                  * If the controller supports
 2091                  * strict round robin mode,
 2092                  * enable it
 2093                  */
 2094                 u_int8_t param;
 2095 
 2096                 param = 0;
 2097                 error = bt_cmd(bt, BOP_ENABLE_STRICT_RR, &param, 1,
 2098                                /*reply_buf*/NULL, /*reply_len*/0,
 2099                                DEFAULT_CMD_TIMEOUT);
 2100 
 2101                 if (error != 0) {
 2102                         printf("btinitmboxes: Unable to enable strict RR\n");
 2103                         error = 0;
 2104                 } else if (bootverbose) {
 2105                         device_printf(bt->dev,
 2106                             "Using Strict Round Robin Mailbox Mode\n");
 2107                 }
 2108         }
 2109         
 2110         return (error);
 2111 }
 2112 
 2113 /*
 2114  * Update the XPT's idea of the negotiated transfer
 2115  * parameters for a particular target.
 2116  */
 2117 static void
 2118 btfetchtransinfo(struct bt_softc *bt, struct ccb_trans_settings *cts)
 2119 {
 2120         setup_data_t    setup_info;
 2121         u_int           target;
 2122         u_int           targ_offset;
 2123         u_int           targ_mask;
 2124         u_int           sync_period;
 2125         u_int           sync_offset;
 2126         u_int           bus_width;
 2127         int             error;
 2128         u_int8_t        param;
 2129         targ_syncinfo_t sync_info;
 2130         struct ccb_trans_settings_scsi *scsi =
 2131             &cts->proto_specific.scsi;
 2132         struct ccb_trans_settings_spi *spi =
 2133             &cts->xport_specific.spi;
 2134 
 2135         spi->valid = 0;
 2136         scsi->valid = 0;
 2137 
 2138         target = cts->ccb_h.target_id;
 2139         targ_offset = (target & 0x7);
 2140         targ_mask = (0x01 << targ_offset);
 2141 
 2142         /*
 2143          * Inquire Setup Information.  This command retreives the
 2144          * Wide negotiation status for recent adapters as well as
 2145          * the sync info for older models.
 2146          */
 2147         param = sizeof(setup_info);
 2148         error = bt_cmd(bt, BOP_INQUIRE_SETUP_INFO, &param, /*paramlen*/1,
 2149                        (u_int8_t*)&setup_info, sizeof(setup_info),
 2150                        DEFAULT_CMD_TIMEOUT);
 2151 
 2152         if (error != 0) {
 2153                 device_printf(bt->dev,
 2154                     "btfetchtransinfo - Inquire Setup Info Failed %x\n",
 2155                     error);
 2156                 return;
 2157         }
 2158 
 2159         sync_info = (target < 8) ? setup_info.low_syncinfo[targ_offset]
 2160                                  : setup_info.high_syncinfo[targ_offset];
 2161 
 2162         if (sync_info.sync == 0)
 2163                 sync_offset = 0;
 2164         else
 2165                 sync_offset = sync_info.offset;
 2166 
 2167 
 2168         bus_width = MSG_EXT_WDTR_BUS_8_BIT;
 2169         if (strcmp(bt->firmware_ver, "5.06L") >= 0) {
 2170                 u_int wide_active;
 2171 
 2172                 wide_active =
 2173                     (target < 8) ? (setup_info.low_wide_active & targ_mask)
 2174                                  : (setup_info.high_wide_active & targ_mask);
 2175 
 2176                 if (wide_active)
 2177                         bus_width = MSG_EXT_WDTR_BUS_16_BIT;
 2178         } else if ((bt->wide_permitted & targ_mask) != 0) {
 2179                 struct ccb_getdev cgd;
 2180 
 2181                 /*
 2182                  * Prior to rev 5.06L, wide status isn't provided,
 2183                  * so we "guess" that wide transfers are in effect
 2184                  * if the user settings allow for wide and the inquiry
 2185                  * data for the device indicates that it can handle
 2186                  * wide transfers.
 2187                  */
 2188                 xpt_setup_ccb(&cgd.ccb_h, cts->ccb_h.path, /*priority*/1);
 2189                 cgd.ccb_h.func_code = XPT_GDEV_TYPE;
 2190                 xpt_action((union ccb *)&cgd);
 2191                 if ((cgd.ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP
 2192                  && (cgd.inq_data.flags & SID_WBus16) != 0)
 2193                         bus_width = MSG_EXT_WDTR_BUS_16_BIT;
 2194         }
 2195 
 2196         if (bt->firmware_ver[0] >= '3') {
 2197                 /*
 2198                  * For adapters that can do fast or ultra speeds,
 2199                  * use the more exact Target Sync Information command.
 2200                  */
 2201                 target_sync_info_data_t sync_info;
 2202 
 2203                 param = sizeof(sync_info);
 2204                 error = bt_cmd(bt, BOP_TARG_SYNC_INFO, &param, /*paramlen*/1,
 2205                                (u_int8_t*)&sync_info, sizeof(sync_info),
 2206                                DEFAULT_CMD_TIMEOUT);
 2207                 
 2208                 if (error != 0) {
 2209                         device_printf(bt->dev,
 2210                             "btfetchtransinfo - Inquire Sync "
 2211                             "Info Failed 0x%x\n", error);
 2212                         return;
 2213                 }
 2214                 sync_period = sync_info.sync_rate[target] * 100;
 2215         } else {
 2216                 sync_period = 2000 + (500 * sync_info.period);
 2217         }
 2218 
 2219         cts->protocol = PROTO_SCSI;
 2220         cts->protocol_version = SCSI_REV_2;
 2221         cts->transport = XPORT_SPI;
 2222         cts->transport_version = 2;
 2223 
 2224         spi->sync_period = sync_period;
 2225         spi->valid |= CTS_SPI_VALID_SYNC_RATE;
 2226         spi->sync_offset = sync_offset;
 2227         spi->valid |= CTS_SPI_VALID_SYNC_OFFSET;
 2228 
 2229         spi->valid |= CTS_SPI_VALID_BUS_WIDTH;
 2230         spi->bus_width = bus_width;
 2231 
 2232         if (cts->ccb_h.target_lun != CAM_LUN_WILDCARD) {
 2233                 scsi->valid = CTS_SCSI_VALID_TQ;
 2234                 spi->valid |= CTS_SPI_VALID_DISC;
 2235         } else
 2236                 scsi->valid = 0;
 2237         
 2238         xpt_async(AC_TRANSFER_NEG, cts->ccb_h.path, cts);
 2239 }
 2240 
 2241 static void
 2242 btmapmboxes(void *arg, bus_dma_segment_t *segs, int nseg, int error)
 2243 {
 2244         struct bt_softc* bt;
 2245 
 2246         bt = (struct bt_softc*)arg;
 2247         bt->mailbox_physbase = segs->ds_addr;
 2248 }
 2249 
 2250 static void
 2251 btmapccbs(void *arg, bus_dma_segment_t *segs, int nseg, int error)
 2252 {
 2253         struct bt_softc* bt;
 2254 
 2255         bt = (struct bt_softc*)arg;
 2256         bt->bt_ccb_physbase = segs->ds_addr;
 2257 }
 2258 
 2259 static void
 2260 btmapsgs(void *arg, bus_dma_segment_t *segs, int nseg, int error)
 2261 {
 2262 
 2263         struct bt_softc* bt;
 2264 
 2265         bt = (struct bt_softc*)arg;
 2266         SLIST_FIRST(&bt->sg_maps)->sg_physaddr = segs->ds_addr;
 2267 }
 2268 
 2269 static void
 2270 btpoll(struct cam_sim *sim)
 2271 {
 2272         bt_intr_locked(cam_sim_softc(sim));
 2273 }
 2274 
 2275 void
 2276 bttimeout(void *arg)
 2277 {
 2278         struct bt_ccb   *bccb;
 2279         union  ccb      *ccb;
 2280         struct bt_softc *bt;
 2281 
 2282         bccb = (struct bt_ccb *)arg;
 2283         ccb = bccb->ccb;
 2284         bt = (struct bt_softc *)ccb->ccb_h.ccb_bt_ptr;
 2285         mtx_assert(&bt->lock, MA_OWNED);
 2286         xpt_print_path(ccb->ccb_h.path);
 2287         printf("CCB %p - timed out\n", (void *)bccb);
 2288 
 2289         if ((bccb->flags & BCCB_ACTIVE) == 0) {
 2290                 xpt_print_path(ccb->ccb_h.path);
 2291                 printf("CCB %p - timed out CCB already completed\n",
 2292                        (void *)bccb);
 2293                 return;
 2294         }
 2295 
 2296         /*
 2297          * In order to simplify the recovery process, we ask the XPT
 2298          * layer to halt the queue of new transactions and we traverse
 2299          * the list of pending CCBs and remove their timeouts. This
 2300          * means that the driver attempts to clear only one error
 2301          * condition at a time.  In general, timeouts that occur
 2302          * close together are related anyway, so there is no benefit
 2303          * in attempting to handle errors in parallel.  Timeouts will
 2304          * be reinstated when the recovery process ends.
 2305          */
 2306         if ((bccb->flags & BCCB_DEVICE_RESET) == 0) {
 2307                 struct ccb_hdr *ccb_h;
 2308 
 2309                 if ((bccb->flags & BCCB_RELEASE_SIMQ) == 0) {
 2310                         xpt_freeze_simq(bt->sim, /*count*/1);
 2311                         bccb->flags |= BCCB_RELEASE_SIMQ;
 2312                 }
 2313 
 2314                 ccb_h = LIST_FIRST(&bt->pending_ccbs);
 2315                 while (ccb_h != NULL) {
 2316                         struct bt_ccb *pending_bccb;
 2317 
 2318                         pending_bccb = (struct bt_ccb *)ccb_h->ccb_bccb_ptr;
 2319                         callout_stop(&pending_bccb->timer);
 2320                         ccb_h = LIST_NEXT(ccb_h, sim_links.le);
 2321                 }
 2322         }
 2323 
 2324         if ((bccb->flags & BCCB_DEVICE_RESET) != 0
 2325          || bt->cur_outbox->action_code != BMBO_FREE
 2326          || ((bccb->hccb.tag_enable == TRUE)
 2327           && (bt->firmware_ver[0] < '5'))) {
 2328                 /*
 2329                  * Try a full host adapter/SCSI bus reset.
 2330                  * We do this only if we have already attempted
 2331                  * to clear the condition with a BDR, or we cannot
 2332                  * attempt a BDR for lack of mailbox resources
 2333                  * or because of faulty firmware.  It turns out
 2334                  * that firmware versions prior to 5.xx treat BDRs
 2335                  * as untagged commands that cannot be sent until
 2336                  * all outstanding tagged commands have been processed.
 2337                  * This makes it somewhat difficult to use a BDR to
 2338                  * clear up a problem with an uncompleted tagged command.
 2339                  */
 2340                 ccb->ccb_h.status = CAM_CMD_TIMEOUT;
 2341                 btreset(bt, /*hardreset*/TRUE);
 2342                 device_printf(bt->dev, "No longer in timeout\n");
 2343         } else {
 2344                 /*    
 2345                  * Send a Bus Device Reset message:
 2346                  * The target that is holding up the bus may not
 2347                  * be the same as the one that triggered this timeout
 2348                  * (different commands have different timeout lengths),
 2349                  * but we have no way of determining this from our
 2350                  * timeout handler.  Our strategy here is to queue a
 2351                  * BDR message to the target of the timed out command.
 2352                  * If this fails, we'll get another timeout 2 seconds
 2353                  * later which will attempt a bus reset.
 2354                  */
 2355                 bccb->flags |= BCCB_DEVICE_RESET;
 2356                 callout_reset(&bccb->timer, 2 * hz, bttimeout, bccb);
 2357 
 2358                 bt->recovery_bccb->hccb.opcode = INITIATOR_BUS_DEV_RESET;
 2359 
 2360                 /* No Data Transfer */
 2361                 bt->recovery_bccb->hccb.datain = TRUE;
 2362                 bt->recovery_bccb->hccb.dataout = TRUE;
 2363                 bt->recovery_bccb->hccb.btstat = 0;
 2364                 bt->recovery_bccb->hccb.sdstat = 0;
 2365                 bt->recovery_bccb->hccb.target_id = ccb->ccb_h.target_id;
 2366 
 2367                 /* Tell the adapter about this command */
 2368                 bt->cur_outbox->ccb_addr = btccbvtop(bt, bt->recovery_bccb);
 2369                 bt->cur_outbox->action_code = BMBO_START;
 2370                 bt_outb(bt, COMMAND_REG, BOP_START_MBOX);
 2371                 btnextoutbox(bt);
 2372         }
 2373 }
 2374 
 2375 MODULE_VERSION(bt, 1);
 2376 MODULE_DEPEND(bt, cam, 1, 1, 1);

Cache object: d68c4738166564e159ddbf766a6aacbc


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